Clamp for connection boxes



April 24, 1928.

w. GOET ZELMAN CLAMP FOR CONNECTION BOXES Filed Aug. v 1926 Apr. 2Q, toss.

srnrs GQETZEMAN, G1 CHICAGO, ILLINOIS, ASSIGNOR T APPLETGQ ELECTRIC UQME ANY, A CORPORATION OF ILLINOIS.

onnirr son. connnb'rron noxns.

Application filed August 30, 1926. Serial No. 132,649.

through the open side of a connection box so as to be accessible when the box'is embedded in plaster or in a well.

In carrying out my invention l employ an engleshoped metal plate having at one edge means, such as e. lip, ior example to interlock with the side well of s connection box and form n rocking connection for the pl ate;

, the other wing having on inturned edge preferably notched to fit over the side of one or more conduits or cables entering the box through thebottorn. When the clamp ing plate is in place one wing may be approximately porallel to but spaced'apsrt from the bottom of the box, while the other "wing may be approximately at right angles and extended into the vicinity of the bottom of the box beside the conduits or cables. A single screw may be passed through the first wing and the box bottom, so that upon tightening the screw it rocks the plate so es drew the inturned edge against the conduit or conduits. The clamp therefore comprises a. single angle plate and a. single screw, in its preferred simplest form and may be applied or removed through the open top oi the box even though the box be embedded in o. well.

The various features of novelty whereby my invention is characterized will herein-' otter be pointed out with particularity in the claims; but, "for c. full understanding of my invention and oi? its obiects end adventoges, reference may he lied to the following detailed description taken in connection with the accompanying di'z'iwing, wherein:

or connection box containing a clump adepted for two conduits or cables, a portion of the cover being broken hway; Fig. 2 is a section on line 2-2 of Fig. 1; Fig. 3 is a section on line 3--3 of Fig. 1; end Fig. 4 is e. section on line H of Fig. 2, the conduits or cables being indicated only in dotted cover 2 for the open top. 3 and l are ormored cables entered loosely through holes located inthe bottom of the box near the side wall which, in this instance is shown as being cylindrical.

My improvedclamp may be made of a piece of heavy punched sheet metal bent along a line extending entirely across the same to form two wings, 5 and 6, arranged approximately at right angles to each other. The wing 5 has a short tongue 7 projecting from its edge remote from the other wing, and it also has two large holes, 8 and 9, to receive the ends of the cables, and a. small hole 10 on the side of the wing opposite that at which the tongue is located. The marginal portion of the wing 6, at the free edge of the letter is bent back so as to underlie the wing 5, as indicated at 11. Notches 12 and 13 are out in the long free edge of the bent part or flange 11, these notches being preferably V-shaped and so located that their sides will be tangent to a cylinder having the holes Sand 9 for their ends. The part 11 has also a hole or slot let underlying the screw hole 10 in the wing 5.

The parts are so proportioned that when the clamping plate is placed in the box with the tongue 7 extending through a small hole 15 in the side of the box midway between the cables and with the wing 5 parallel with the bottom of the box, the wing S will lie on the for side of the cables end the latter will lie in the notches 12 and i3 while the armor or sheathing of the cabl will terminate at or below the wing 5 so that the conductors may be carried through the holes 8 end 9. Then. when a screw 16 is psssed through the hole 10 and engaged with e screw-thresded hole in the'bottom of the box, the tightening of the screw will rock the plate about its hinge connection with the side of the box, drawing I the flange 11 over against the cables and Figure l is s top plan view of an outlet While l have illustrated and described with particularity only a single preferred form of my invention, 1 do not desire to be limited to the exact structural details thus illustrated and described; but intend to cover all forms and arrangements which come within the definitions of my invention eonstituting the appended claims.

I claim:

1. The combination with a connection box having a hole in the bottom near a side wall, an angle plate arranged within the box and having one wing parallel and spaced apart from the bottom wall and the other wing parallel with the side wall and extending from the inner end of said first wing toward said bottom wall, a screw passing through the first wing and the bottom Wall, said side wall and the free end of the first wing having cooperating means interlocked with each other to form a rocking connection, the free edge of the second wing being bent toward the side-wall somewhat above said bottom wall to form. a lip to engage a conduit extending through said hole, and

- neeaeee there being in said first wing a hole in. align- I and spaced apart from the bottom wall and having holes in alignment with and of about the same diameter as the holes. in the bottom wall, the second wing being approximately at right angles to the bottom Wall and extending from the inner end of said first wing toward said bottom wall, a screw passing through the first wing into the bottom wall, the free edge of the first wing having cooperating means interlocked with the side wall to permit the wing to rock, and the free end of the second wing being bent laterally above said bottom andtoward the said side wall to form a lip'to grip conduits pass ing through said holes in the bottom wall,

In testimony whereof, ll sign this speeification.

WILLIAM GUETZELMAN 

